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AZ81A Magnesium vs. C92800 Bronze

AZ81A magnesium belongs to the magnesium alloys classification, while C92800 bronze belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AZ81A magnesium and the bottom bar is C92800 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 3.0 to 8.8
1.0
Poisson's Ratio 0.29
0.35
Shear Modulus, GPa 18
37
Tensile Strength: Ultimate (UTS), MPa 160 to 240
280
Tensile Strength: Yield (Proof), MPa 84
210

Thermal Properties

Latent Heat of Fusion, J/g 350
170
Maximum Temperature: Mechanical, °C 130
140
Melting Completion (Liquidus), °C 600
960
Melting Onset (Solidus), °C 500
820
Specific Heat Capacity, J/kg-K 990
350
Thermal Expansion, µm/m-K 27
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 65
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
36
Density, g/cm3 1.7
8.7
Embodied Carbon, kg CO2/kg material 23
4.1
Embodied Energy, MJ/kg 160
67
Embodied Water, L/kg 990
430

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
2.5
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
210
Stiffness to Weight: Axial, points 15
6.4
Stiffness to Weight: Bending, points 70
18
Strength to Weight: Axial, points 26 to 39
8.8
Strength to Weight: Bending, points 38 to 50
11
Thermal Shock Resistance, points 9.1 to 14
11

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0 to 0.0050
Antimony (Sb), % 0
0 to 0.25
Copper (Cu), % 0 to 0.1
78 to 82
Iron (Fe), % 0
0 to 0.2
Lead (Pb), % 0
4.0 to 6.0
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0 to 0.8
Phosphorus (P), % 0
0 to 1.5
Silicon (Si), % 0 to 0.3
0 to 0.0050
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
15 to 17
Zinc (Zn), % 0.4 to 1.0
0 to 0.8
Residuals, % 0 to 0.3
0 to 0.7